Selenium training institutes in Chennai - selenium testing training in Chennai

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Selenium
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Agenda

• Introduction to Selenium
• Father of Selenium
• Same Origin Policy
• Birth of Selenium Remote Control(RC)
• Birth of Selenium Grid
• Birth of Selenium IDE
• Birth of Web Driver
• Birth of Selenium 2
• Conclusion

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Introduction to Selenium

• Selenium is a free (open source) automated
  testing suite for web applications across
  different browsers and platforms.
• It is quite similar to HP Quick Test Pro (QTP now
  UFT) only that Selenium focuses on automating
  web-based applications. Testing done using
  Selenium tool is usually referred as Selenium
  Testing.

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• Selenium is not just a single tool but a suite
  of software's, each catering to different testing
  needs of an organization. It has four
  components.
• Selenium Integrated Development Environment (IDE)
• Selenium Remote Control (RC)
• WebDriver
• Selenium Grid

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Four components
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Father of Selenium

• Primarily, Selenium was created by Jason Huggins
  in 2004. An engineer at ThoughtWorks, he was
  working on a web application that required
  frequent testing.
• Having realized that the repetitious Manual
  Testing of their application was becoming more
  and more inefficient, he created a JavaScript
  program that would automatically control the
  browser's actions. He named this program as the
  "JavaScriptTestRunner."
• Seeing potential in this idea to help automate
  other web applications, he made JavaScript Runner
  open-source which was later re-named as Selenium
  Core.

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Origin policy issue

• Same Origin policy prohibits JavaScript code from
  accessing elements from a domain that is
  different from where it was launched.
• Example, the HTML code in www.google.com uses a
  JavaScript program "randomScript.js". The same
  origin policy will only allow randomScript.js to
  access pages within google.com such as
  google.com/mail, google.com/login, or
  google.com/signup. However, it cannot access
  pages from different sites such as
  yahoo.com/search or guru99.com because they
  belong to different domains.

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Birth of Selenium Remote Control

• Unfortunately testers using Selenium Core had to
  install the whole application under test and the
  web server on their own local computers because
  of the restrictions imposed by the same origin
  policy.
•  So another ThoughtWork's engineer, Paul Hammant,
  decided to create a server that will act as an
  HTTP proxy to "trick" the browser into believing
  that Selenium Core and the web application being
  tested come from the same domain. This system
  became known as the Selenium Remote
  Control or Selenium 1.

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Birth of Selenium Grid

• Selenium Grid was developed by Patrick
  Lightbody to address the need of minimizing test
  execution times as much as possible.
• He initially called the system "Hosted QA."
• It was capable of capturing browser screenshots
  during significant stages, and also of sending
  out Selenium commands to different machines
  simultaneously.

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Birth of Selenium IDE

• Shinya Kasatani of Japan created Selenium IDE, a
  Firefox extension that can automate the browser
  through a record-and-playback feature.
• He came up with this idea to further increase the
  speed in creating test cases. He donated Selenium
  IDE to the 

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Birth of Selenium WebDriver

• Simon Stewart created WebDriver circa 2006 when
  browsers and web applications were becoming more
  powerful and more restrictive with JavaScript
  programs like Selenium Core. 
• It was the first cross-platform testing framework
  that could control the browser from the OS level. 

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Birth of Selenium2

• In 2008, the whole Selenium Team decided to merge
  Web Driver and Selenium RC to form a more
  powerful tool called Selenium 2, with Web Driver
  being the core.
• Currently, Selenium RC is still being developed
  but only in maintenance mode. Most of the
  Selenium Project's efforts are now focused on
  Selenium 2.

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Conclusion

• Although selenium is highly toxic in many of its
  chemical forms, a number off actors suggest that
  it probably is not a significant pollution
  problem.
• The bulk of the industrial uses of selenium are
  such that only small amounts of the element are
  injected into the ecosphere.
• Un-doubtedly, the paucity of data on the selenium
  content of various environmental samples is
  partly due to the difficulty of performing
  selenium analyses.

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